Composition-filled brake-shoe.



H. IONES & R. C. AUGUII.

COMPOSITION FILLED BRAKE SHOE.

APPLICATION FILED IAN-Z, 15H4.

Paltoned Jan. 23, 1917.

2 SHEETS-SHEET I.

Attest:

H. JONES & R40. AUGUR. coMPosIIIoN FILLED BRAKE sHoE.

APPLICATION FILED IAN.2, |914.

Patented Jan. 23, 1917.

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yHARRY JONES AND ROBERT C. AUC-UR, OF SUFFERN, NEW YORK, ASSIGNORS, BY MESNE ASSIGNMENTS, TO THE AMERICAN BRAKE SHOE &, FOUNDRY COMPANY, WIL- MINGTON, DELAWARE, A CORPORATION' OF DELAWARE.

Appli-cation filed January 2, 1914.

To @ZZ ictom t may concern Be it known that we, HARRY JONES and ROBERT C. AUGUR, citizens of the United States, and residents of Suffern, in the county of Rockland and State of New York, have made and invented certain new and useful 'improvements in Composition-Filled Brake-Shoes, of which the following is a specication.

Our invention relates to brake shoes designed for use upon railway vehicles, and particularly to that kind or type thereof commonly referred to as a composition filled shoe, and in which the body portion thereof comprises a non-metallic material, or a composition made for the most part of' nonmetallic substance the said body portion being supported by a suitable metallic shell, or casing, applied thereto in a plastic con* dition and molded or pressed into intimate contact therewith.

As different service conditions often require dierent degrees of friction in the brake shoe, it is frequently desirable to vary the character of the wearing face of a composition lled brake shoe in order to adapt the latter to a particular service, as by providing a greater or less area of metal in the wearing face which is made up partly of metal and partly of a non-metallic substance. The frictional or retarding qualities of the brake shoe may thereby be varied and modified, all with the end in view of securing a shoe which will wear away as slowly as possible, while at the same time possessing frietional and retarding qualities suitable for the service for which it is designed.

The object of our invention is therefore to provide a composition filled brake shoe in which provision is made for conveniently providing metallic areas in the wearing face of a composition filled shoe, such areas vary ing in extent according to the service for which the shoe is required.

lVith the above and other objects in view, our invention consists in the improved composition illed brake shoe illustrated in the accompanying' drawings and hereinafter described and claimed, and in such variations and modifications thereof as will be obvious to those skilled in the art to which our invention relates.

In the drawings wherein the preferredem- Specification of Letters Patent.

Patented J an. 23, 1917.

sei-iai No. 809,821.

bodiment of our invention is illustrated: Figure 1 is a view showing a flanged shoe made in accordance with our invention, a portion thereof being broken away to better' illustrate certain features thereof; Fig. 2 is a view showing the supporting-shell and end blocks of the. shoe, the composition lilling being omitted; Fig. 3 is a view showing the wearing face of the shoe shown in Fig. l; Fig. Ll is a view showing a section taken upon a transverse plane indicated by the line 4l, il, Fig. l; Fig. is a view showing the wearing face of an iin-flanged shoe made in accordance with our invention; Fig. 6 is a view showing a form of metallic block employed in a fianged shoe, in perspective; Fig. 7 is a similar viewv showing a form of block used in iin-flanged shoes.

Referring to the drawings, the reference numeral 15, Figs. l to 4r, designates a metallic shell or casing, made hollow, and designed to contain and support the nonmetallic or composition body portion 16 of the shoe until the same is worn out in service, or worn to such an extent as to be no longer serviceable. This supporting shell ma)1 be made of cast or malleable iron, or of thin plate or sheet metal pressed and shaped into proper form, or in other ways, as the particular form vor features of construction of the supporting shell or casing is immaterial. The non-metallic or composition body portion 16 may also be made in accordance with any of the well known formulzc or methods common in the art relating to composition filled brake shoes, and the same may be applied to the shell in a plastic condition and under pressure, or otherwise; or rst molded to form a block to be thereafter placed in the shell or support and secured thereto; these being Inatters well understood and within the knowl edge of those skilled in the art.

Referring still to Figs. l to 4, and 6, the

reference numeral 17 designates two `metallic blocks located within the shell or casing 15, and in contact with the end walls thereof. These blocks extend to the wearing face of the shoe so as to be worn away simultaneously with the body and shell, and, while they are shown as approximately rectangular in outline, as seen looking toward the wearing face of the shoe7 their form is of secondary importance. These blocks preferably fit somewhat loosely in the shell or casing so that they may be easily placed therein and, in the forni of our invention illustrated in said figures, are not secured to the supporting shell or casing. The metallic blocks are preferably placed at the ends of the shoe, for being harder than the composition body portion, the latter is thereby protected from breaking up or crumbling, and permit the shoe to wear away more uni- Vlornily throughout its length. rlhe blocks may, however, be placed anywhere in the shell or casing; thus, for eX- aniple, Fig. 5 illustrates a shoe having a central metallic block 18, located within the shell or casing 19 containing the composition body portion 20. This figure shows the shoe as having end blocks Q1, in addition to the central block 18, as end blocks are generally desirable, although not indispensable, in carrying out our` invention.

Figs. 1 to l illustrate our invention as embodied in a brake shoe having a flange to engage the flange of a car wheel, while Fig. 5 shows our invention as embodied in an uni'langed shoe.

Having thus described and explained our invention, we claim and desire to secure by Letters Patent:

1. )i brake shoe consisting of a shell or casing substantially trough-shape, metallic blocks positioned within said shell, conforming in shape to, and contacting throughout with, the end walls of said shell and supplementing the same, and a composition body portion contained within said shell and forming, in conjunction with Said metallic blocks and casing, a wearing body.

2. A brake shoe consisting of a casing substantially trough-shape, including end Walls, metallic blocks positioned Within said casing, extending between the side walls thereot', said metallic blocks approximating the shape of, and contacting throughout with,

the said end walls of the casing, and a wearing body portion contained within the shell and extending between said metallic blocks.

Signed at Suii'ern, in the county of Rockland, and State of New York, this 23 day of Uecember, A. D. 1913.

HARRY JONES. ROBERT C. AUGUR. 'itnesses EVELYN E. HALDEMAN, ALFRED B. RoNK.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

